GTkStyle undefined symbol error in third party application

I'm having an issue getting PySide to work within a third party application (RV). The app should support using PySide for plugin development, as stated by the developers, but I can't seem to get PySide working. The most recent issue is when I try to import QtGui from PySide I get the error: QtGui.so: undefined symbol: _ZTI9QGtkStyle

I'm running Ubuntu 12.04, and RV is running a custom python2.6 interpreter. I'm using the BuildScripts repository to build PySide (as recommended "here":http://qt-project.org/wiki/Building_PySide_on_Linux ) I've tried adding -DQT_NO_STYLE_GTK=1 to the build_and_install script's arguments but it doesn't seem to be picking it up.

I know it's something in the application itself because I can open the standard python2.6 interpreter and import QtGui just fine.